When I run this SQL query, I get the following error:

injury_or_illness, cust from test where cust
LIKE (
select code from lookup where lookuparea='DEPARTMENTS' and data_id in (
select data_id from lookup_email where receipient = 'Admin'
and notification_type = 'Representative'))||'%';


ORACLE-01427: single-row subquery returns more than one row.

Is there a SQL equivalent that will achieve the above using the LIKE operator?